The earthquake's epicenter was located just six miles south-southwest of Napa, Calif., the center of America's wine industry. This is the strongest seismic event to hit the region in 25 years.

American Canyon, a city that houses some of the largest wine warehouses in Napa, was also impacted by the earthquake. According to Stonebridge Research, a wine-industry consulting group, many of the relatively new warehouses are equipped for earthquake damage.

Duncan told ABC News that the bottles are reference wines used to assess how wines change over time across different vineyard properties, but he added that they are worth "several hundred dollars a bottle."